It seems like you catch as many around the waist as you do around the neck. You could change your loop size to get more around the neck. I’ve never come up on them alive in the snare. I think you would have to get to them within a minute or so, snares kill really quickly with locking collars. Probably 1 1/2-2 1/2” loop, you want to make sure they can’t run around it, the small loop should get more by the neck but will probably have a slightly lower success rate. I think they think of the snare wire as just another vine hanging from a tree limb, no animal I’ve trapped has become trap shy of a snare that I could tell, of course I’m not there watching it but I’ve been successful with the same set for extended periods. I’ve used the conibear in a bucket set to trap coons, critters seem to catch on to that trick quick though. You can also use snares in no kill sets with a relaxing collar. That’s how I set them if it’s not in a tree in case a cat or dog gets in it. If eradication is the goal I think you would be hard pressed to find something as effective as a good snare set.
Beau